Dishwasher
3E
The 3E error code on a Samsung dishwasher points to a problem with the wash motor — specifically, the appliance isn’t detecting the motor spinning correctly during a cycle. It’s one of the more serious error codes you can encounter, but it doesn’t always mean an expensive repair. In this guide, you’ll learn exactly what triggers the 3E code, what you can safely check yourself, and when it’s time to call in a professional.
What does this error mean?
The 3E error code on a Samsung dishwasher indicates a fault with the main wash motor (also called the circulation pump motor). During a wash cycle, Samsung’s control board continuously monitors the motor’s performance using a sensor known as a Hall sensor or tachometer. This sensor measures the motor’s rotation speed and feeds that data back to the control board. If the board detects that the motor isn’t spinning at all, is spinning too slowly, or is drawing an abnormal amount of current, it shuts the cycle down and displays 3E to protect the appliance from further damage. In plain English: your dishwasher started a wash cycle, tried to pump water around the spray arms, and either the motor didn’t respond correctly or the control board couldn’t confirm it was working properly.
Est. repair cost
Hall sensor replacement: £80–£130 (parts + labour). Full wash motor/circulation pump replacement: £150–£260 (parts + labour). DIY Hall sensor part only: £15–£35. DIY motor part only: £60–£110. Typical call-out/diagnostic fee: £60–£90.
🔍 Likely causes
🛠️ Step-by-step fix
Step 1 — Reset the dishwasher: Switch the dishwasher off at the mains socket, wait a full 5 minutes (not just 30 seconds), then switch it back on and attempt a new cycle. A temporary motor overload or sensor glitch will sometimes clear itself after a proper power reset.
Step 2 — Check the water supply: Make sure the cold water inlet tap (usually under the kitchen sink) is fully open and the inlet hose isn’t kinked or squashed behind the machine. A restricted water supply can cause dry-running, which stresses the motor and triggers 3E.
Step 3 — Remove and inspect the filters: Pull out the bottom rack and remove the cylindrical mesh filter and flat coarse filter from the base of the dishwasher tub. Rinse them under the tap and check for large debris — no tools needed. Blocked filters force the pump to work harder and can contribute to motor faults.
Step 4 — Check the sump area for obstructions: With the filters removed, shine a torch into the sump (the circular well at the bottom of the tub). Look for broken glass, bones, fruit stones, or any solid debris sitting on top of the pump cover. Use rubber gloves and carefully remove anything you can see without dismantling anything.
Step 5 — Manually rotate the pump impeller (if accessible): On some Samsung models, there is a removable pump cover in the sump that can be unclipped by hand (consult your model’s manual to confirm). If yours allows access, gently try to rotate the impeller blades with a finger. If they are completely seized or feel gritty and resistant, a blockage or seized motor is likely the cause.
Step 6 — Run a short cycle and listen carefully: After completing steps 1–5, run a quick wash cycle and listen during the first 2–3 minutes. You should hear the motor humming and water circulating through the spray arms. A complete silence from the motor, a loud grinding or buzzing noise, or an immediate return of the 3E code all point to a motor or sensor fault that requires professional attention.
Step 7 — Check the error code history via the control panel: On many Samsung dishwasher models, you can access a diagnostics mode by pressing and holding specific button combinations (refer to your model’s manual, as this varies). This can confirm whether the 3E code is an active fault or a stored historical code, which helps narrow down whether the fault is intermittent or persistent.
Step 8 — Do NOT attempt to open the base panel or disconnect motor wiring yourself: The wash motor is located inside the sealed base unit of the dishwasher and is connected to 240V mains wiring. Accessing it requires disconnecting the appliance, removing the kick plate and base cover, and handling live electrical components. This is not a safe DIY task for a homeowner — stop here and call a qualified appliance engineer.
📞 When to call a professional
You should stop DIY troubleshooting and call a qualified appliance engineer if: the 3E error returns immediately after a full power reset; you can hear the motor buzzing but not spinning (a sign of a seized motor or capacitor failure); there is no sound at all from the motor during a cycle; or you’ve cleared any visible blockages and the fault persists. When you call, tell the engineer the exact error code (3E), your Samsung dishwasher’s model number (printed on the inner door edge), and what steps you’ve already tried. This will save diagnostic time and may reduce your call-out fee. A good engineer will want to know whether the motor is seized, whether it’s a Hall sensor fault, or whether the PCB is misreporting — giving them this context upfront helps. Look for engineers with Samsung appliance experience or those who are members of a recognised trade body such as DASA (Domestic Appliance Service Association).
⚖️ Repair or replace?
If your Samsung dishwasher is under 5 years old, repair is almost always worth it. A Hall sensor replacement is a relatively affordable fix, and even a new circulation pump motor, while more costly, is significantly cheaper than a new appliance. Samsung has good parts availability in the UK through suppliers like ESPARES, 4PartsDirect, and BuySpares, so parts are generally obtainable within a few days. If your machine is between 5 and 8 years old, weigh the repair quote carefully: if the motor needs replacing and labour is included, you could be looking at £150–£250. At that cost, repair still makes sense for a mid-range or premium Samsung model. If your dishwasher is over 8–10 years old, particularly a budget model, and the motor has failed completely, replacement becomes more competitive — a decent new dishwasher starts from around £300–£350 in the UK. If the fault turns out to be the main PCB on an older machine, replacement is strongly recommended, as PCB repairs are expensive and rarely cost-effective on ageing appliances.